think that's actually pretty common - the break creates a strength imbalance between the legs which takes a long time to resolve; also psychologically makes you favour the uninjured leg where it does more of the work and is also more prone to injury

His leg fell off. But he was willing to play on with just one leg before the 4th official decided it was against Premier League rules so he picked it up off the changing room floor and watched the 2nd half from a box.